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part: detect EFI system partition

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Up to now for MBR and GPT partitions the info field 'bootable' was set to 1
if either the partition was an EFI system partition or the bootable flag
was set.

Turn info field 'bootable' into a bit mask with separate bits for bootable
and EFI system partition.

This will allow us to identify the EFI system partition in the UEFI
sub-system.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2020-03-19 13:49:34 +01:00
parent 4fe050e65f
commit 25801acc1f
4 changed files with 32 additions and 13 deletions
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4
cmd/gpt.c
View file

@ -245,7 +245,7 @@ static void print_gpt_info(void)
printf("Block size %lu, name %s\n", curr->gpt_part_info.blksz,
curr->gpt_part_info.name);
printf("Type %s, bootable %d\n", curr->gpt_part_info.type,
curr->gpt_part_info.bootable);
curr->gpt_part_info.bootable & PART_BOOTABLE);
#ifdef CONFIG_PARTITION_UUIDS
printf("UUID %s\n", curr->gpt_part_info.uuid);
#endif
@ -535,7 +535,7 @@ static int set_gpt_info(struct blk_desc *dev_desc,
/* bootable */
if (found_key(tok, "bootable"))
parts[i].bootable = 1;
parts[i].bootable = PART_BOOTABLE;
}
*parts_count = p_count;

14
disk/part_dos.c
View file

@ -45,9 +45,15 @@ static inline int is_extended(int part_type)
part_type == 0x85);
}
static inline int is_bootable(dos_partition_t *p)
static int get_bootable(dos_partition_t *p)
{
return (p->sys_ind == 0xef) || (p->boot_ind == 0x80);
int ret = 0;
if (p->sys_ind == 0xef)
ret |= PART_EFI_SYSTEM_PARTITION;
if (p->boot_ind == 0x80)
ret |= PART_BOOTABLE;
return ret;
}
static void print_one_part(dos_partition_t *p, lbaint_t ext_part_sector,
@ -60,7 +66,7 @@ static void print_one_part(dos_partition_t *p, lbaint_t ext_part_sector,
"u\t%08x-%02x\t%02x%s%s\n",
part_num, lba_start, lba_size, disksig, part_num, p->sys_ind,
(is_extended(p->sys_ind) ? " Extd" : ""),
(is_bootable(p) ? " Boot" : ""));
(get_bootable(p) ? " Boot" : ""));
}
static int test_block_type(unsigned char *buffer)
@ -258,7 +264,7 @@ static int part_get_info_extended(struct blk_desc *dev_desc,
(char *)info->name);
/* sprintf(info->type, "%d, pt->sys_ind); */
strcpy((char *)info->type, "U-Boot");
info->bootable = is_bootable(pt);
info->bootable = get_bootable(pt);
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
sprintf(info->uuid, "%08x-%02x", disksig, part_num);
#endif

16
disk/part_efi.c
View file

@ -71,11 +71,15 @@ static char *print_efiname(gpt_entry *pte)
static const efi_guid_t system_guid = PARTITION_SYSTEM_GUID;
static inline int is_bootable(gpt_entry *p)
static int get_bootable(gpt_entry *p)
{
return p->attributes.fields.legacy_bios_bootable ||
!memcmp(&(p->partition_type_guid), &system_guid,
sizeof(efi_guid_t));
int ret = 0;
if (!memcmp(&p->partition_type_guid, &system_guid, sizeof(efi_guid_t)))
ret |= PART_EFI_SYSTEM_PARTITION;
if (p->attributes.fields.legacy_bios_bootable)
ret |= PART_BOOTABLE;
return ret;
}
static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba,
@ -286,7 +290,7 @@ int part_get_info_efi(struct blk_desc *dev_desc, int part,
snprintf((char *)info->name, sizeof(info->name), "%s",
print_efiname(&gpt_pte[part - 1]));
strcpy((char *)info->type, "U-Boot");
info->bootable = is_bootable(&gpt_pte[part - 1]);
info->bootable = get_bootable(&gpt_pte[part - 1]);
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
UUID_STR_FORMAT_GUID);
@ -501,7 +505,7 @@ int gpt_fill_pte(struct blk_desc *dev_desc,
memset(&gpt_e[i].attributes, 0,
sizeof(gpt_entry_attributes));
if (partitions[i].bootable)
if (partitions[i].bootable & PART_BOOTABLE)
gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
/* partition name */

11
include/part.h
View file

@ -51,13 +51,22 @@ struct block_drvr {
#define PART_TYPE_LEN 32
#define MAX_SEARCH_PARTITIONS 64
#define PART_BOOTABLE ((int)BIT(0))
#define PART_EFI_SYSTEM_PARTITION ((int)BIT(1))
typedef struct disk_partition {
lbaint_t start; /* # of first block in partition */
lbaint_t size; /* number of blocks in partition */
ulong blksz; /* block size in bytes */
uchar name[PART_NAME_LEN]; /* partition name */
uchar type[PART_TYPE_LEN]; /* string type description */
int bootable; /* Active/Bootable flag is set */
/*
* The bootable is a bitmask with the following fields:
*
* PART_BOOTABLE the MBR bootable flag is set
* PART_EFI_SYSTEM_PARTITION the partition is an EFI system partition
*/
int bootable;
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
char uuid[UUID_STR_LEN + 1]; /* filesystem UUID as string, if exists */
#endif